Where can you ground an alarm panel?

• A. Metallic cold water pipe only
• B. Metallic cold water pipe and earth soil ground rod
• C. Non-conductive surface
• D. Wooden stake

Answer: (B)

Grounding an alarm panel creates a low-impedance path to earth so the system has a stable reference and can safely carry fault currents. A metallic cold-water pipe is a common grounding electrode because it’s usually bonded to the building’s main grounding system, providing a readily accessible path to earth. An earth soil ground rod adds another solid electrode, giving an additional, independent reference to ground. Both options are conductive and connected into the building’s grounding network, which is why they are acceptable grounding points. Non-conductive surfaces and wooden stakes cannot carry fault currents, so they cannot serve as grounding paths. Using both a metal water pipe and a ground rod gives multiple reliable grounding paths, improving reliability and meeting typical code expectations.